﻿#region Copyright (c) 2003 - 2008, Andreas Mueller
/////////////////////////////////////////////////////////////////////////////////////////
// 
// Copyright (c) 2003 - 2008, Andreas Mueller.
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// Contributors:
//    Andreas Mueller - initial API and implementation
//
// 
// This software is derived from software bearing the following
// restrictions:
// 
// Copyright (c) 1994
// Hewlett-Packard Company
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Hewlett-Packard Company makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// Copyright (c) 1996,1997
// Silicon Graphics Computer Systems, Inc.
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Silicon Graphics makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// (C) Copyright Nicolai M. Josuttis 1999.
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// 
/////////////////////////////////////////////////////////////////////////////////////////
#endregion

using NStl.Linq;
using NUnit.Framework;
using NStl.Iterators;
using System.Collections;
using NUnit.Framework.SyntaxHelpers;
using System.Collections.Generic;
using NStl.Iterators.Support;

namespace NStl.NUnit.AlgorithmFixtures.Rotate
{
    public abstract class RotateBaseFixture
    {
        private static IForwardIterator<int> first;
        private static IForwardIterator<int> last;
        private static List<int> src;
        [SetUp]
        protected void SetUp()
        {
            src = new List<int>{-3, -2, -1, 0, 1, 2, 3, 4, 5};
            first = AdaptVector(src.Begin());
            last = AdaptVector(src.End());
        }

        protected abstract IForwardIterator<int> AdaptVector(ListTIterator<int> iterator);
        [Test]
        public void SuccessfullPass()
        {
            ICollection expected = new[] { 0, 1, 2, 3, 4, 5, -3, -2, -1 };
            ICollection expectedLower = new[] { 0, 1, 2, 3, 4, 5 };
            ICollection expectedUpper = new[] { -3, -2, -1 };

            IForwardIterator<int> it =
                Algorithm.Rotate<int, IForwardIterator<int>>(first, first.Add(3), last);

            Assert.That(src, Is.EqualTo(expected));

            Assert.That(first.AsCollection(it), Is.EqualTo(expectedLower));
            Assert.That(it.AsCollection(last),  Is.EqualTo(expectedUpper));

        }
        [Test]
        public void MiddleIteratorEqualsBegin()
        {
            ICollection expected = src.ToArray();

            IForwardIterator<int> it =
                Algorithm.Rotate<int, IForwardIterator<int>>(first, (IForwardIterator<int>)first.Clone(), last);

            Assert.That(src, Is.EqualTo(expected));

            Assert.That(it, Is.EqualTo(last));
        }
        [Test]
        public void MiddleIteratorEqualsEnd()
        {
            ICollection expected = src.ToArray();

            IForwardIterator<int> it =
                Algorithm.Rotate<int, IForwardIterator<int>>(first, (IForwardIterator<int>)last.Clone(), last);

            Assert.That(src, Is.EqualTo(expected));

            Assert.That(it, Is.EqualTo(first));
        }
    }
}
